Frost Dates for 77077 — Houston, Texas

Half of springs at Houston Sugarland Mem, TX see their last 32°F night by February 2; only one in ten is past it by December 28, and one in ten still has one after March 7. Planting tender crops after February 20 leaves a 30% risk of a frost on them, after February 27 20%, and after March 7 10%. The 33 days between the even-odds date and the one-in-ten date is wider than at 95% of the 339 Texas stations behind this site's ZIP pages, so a fixed calendar date is a gamble here.

In fall the first 32°F night comes by December 11 in half of years, as early as November 20 one year in ten, and holds off past January 16 one year in ten. A hard freeze of 28°F follows 21 days later, around January 1; in spring the one-in-ten date for 28°F is February 23, 12 days before the 32°F one. The freeze-free season lasts 318 days in a typical year, longer than at 91% of the 339 Texas stations; it reaches 357 days one year in ten and falls short of 276 one year in ten. On average 10 nights a year drop to 32°F or below. Nights of 36°F, when frost can still settle on leaves in low, open spots, continue 24 days longer, to about February 26, and return around November 27. A 24°F night is unusual: 19% of winters had one.

July is the warmest month at Houston Sugarland Mem, TX, averaging 95°F by day and 76°F at night; January is the coldest at 64°F and 45°F. From April to October the chance of a 32°F night stays under 10% each month. In spring, February still brings one in 40% of years and March still brings one in 17% of years.

Warmth for growing adds up to 7,845 growing degree days a year (base 50°F), more than at 86% of the 351 Texas stations. 43% of them (3,401) have built up by the end of June, and July adds the most, 1,096. Precipitation totals 49.8 inches a year, most in August (5.3") and least in February (2.8"); May to September bring 47% of it.

The nearest other station, Sugar Land, TX, 9 miles south of Houston, has a last frost 7 days later (February 9), a first frost 2 days later (December 13), a season 13 days shorter.

Measurable snow is rare here: only 0 of 19 winters from 1991 to 2020 recorded 0.1 inch or more at Clodine, TX, 5.5 miles away, so there is no typical first-snow date to plan around.

ZIP 77077 is 9 miles from Houston Sugarland Mem, TX, which stands at 82 feet, the nearest NOAA station that publishes freeze probabilities for 1991–2020. 28 other ZIP codes share the station; its figures are presented in full for 77494 (Katy). The 2023 USDA Plant Hardiness Zone Map lists ZIP 77077 in zone 9b, the band where the coldest night of the year averaged 25 to 30°F (-3.9 to -1.1°C) over 1991–2020; a zone describes winter lows, not frost dates.